syzbot

------------[ cut here ]------------
!cmp
WARNING: net/wireless/scan.c:1666 at rb_insert_bss net/wireless/scan.c:1666 [inline], CPU#0: kworker/u4:5/1038
WARNING: net/wireless/scan.c:1666 at cfg80211_rehash_bss+0x1e6/0x540 net/wireless/scan.c:1723, CPU#0: kworker/u4:5/1038
Modules linked in:
CPU: 0 UID: 0 PID: 1038 Comm: kworker/u4:5 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:rb_insert_bss net/wireless/scan.c:1666 [inline]
RIP: 0010:cfg80211_rehash_bss+0x1e6/0x540 net/wireless/scan.c:1723
Code: e8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 33 03 00 00 ff 45 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 8c ae b3 00 cc 90 <0f> 0b 90 4c 8b 2c 24 4c 89 ef e8 1b 0f c4 f9 84 c0 74 78 e8 82 b6
RSP: 0018:ffffc900059e6f20 EFLAGS: 00010246
RAX: ffffffff8aeba555 RBX: 0000000000000000 RCX: 0000000000000002
RDX: ffff888033f10000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88801cd90468 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000002 R12: ffff8880434181a0
R13: ffff88804018c430 R14: dffffc0000000000 R15: ffff888034fc1020
FS:  0000000000000000(0000) GS:ffff88808cad4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f058df80ad8 CR3: 000000001cc98000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 cfg80211_update_assoc_bss_entry+0x3fa/0x6a0 net/wireless/scan.c:3464
 cfg80211_ch_switch_notify+0x3c1/0x770 net/wireless/nl80211.c:20957
 ieee80211_sta_process_chanswitch+0xbba/0x28f0 net/mac80211/mlme.c:-1
 ieee80211_rx_mgmt_beacon+0x1e98/0x3360 net/mac80211/mlme.c:7602
 ieee80211_sta_rx_queued_mgmt+0x545/0x48d0 net/mac80211/mlme.c:8175
 ieee80211_iface_process_skb net/mac80211/iface.c:1737 [inline]
 ieee80211_iface_work+0x652/0x12b0 net/mac80211/iface.c:1794
 cfg80211_wiphy_work+0x2ab/0x450 net/wireless/core.c:438
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>